Gastric reflux prevention valve. Exclusive PAAB (Pressure Activated Air Buffer). Double lumen PVC tube – one for suction drainage and one for sump vent. X-ray opaque sentinel line with sentinel eye. Integral funnel connector with removable 5-in-1 adapter. Integral irrigation funnel for irrigating through sump vent lumen. Funnel end of vent lumen can be used to cap 5-in-1 adapter. Sterile.